Draft: An example MR to switch the codebase to HepMC3 3.2.6 (!62797) · Merge requests · atlas / athena

An example MR to switch the codebase to HepMC3 3.2.6.

The HepMC3 3.2.5+ has functions that emulate the HepMC2, so a lot of #ifdef HEPMC3 statements can be removed.

Draft: An example MR to switch the codebase to HepMC3 3.2.6